Use the Cisco Feature Navigator to find information about platform and software image support. To access Cisco Feature Navigator, go to http://www.cisco.com/go/cfn . Cisco TrustSec Overview Feature History for Cisco TrustSec Overview Release Feature Feature Information Cisco IOS XE 17.15.x AAA PAC-less Authentication In multi ISE node environment when the primary ISE node is unavailable, device can automatically switch to the secondary node without needing to re-establish PAC, ensuring minimal disruption.
AAA PAC-less authentication simplifies the authentication process by eliminating the need for a PAC, improves scalability, enhances the user experience, and enables more modern authentication methods while aligning with Zero Trust security principles. This feature was implemented on all models of the Cisco Catalyst 9300 Series Switches. Cisco TrustSec Overview 21